package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomException;
import com.itheima.mapper.CategoryMapper;
import com.itheima.pojo.Category;
import com.itheima.pojo.Dish;
import com.itheima.pojo.Setmeal;
import com.itheima.service.CategoryService;
import com.itheima.service.DishService;
import com.itheima.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category>implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Override
    public void remove(Long id) {
        //添加条件，根据id查询
        LambdaQueryWrapper<Dish> qw1 = new LambdaQueryWrapper<>();
        qw1.eq(Dish::getId,id);
        int count1 = dishService.count(qw1);
        //如果关联，抛出异常
        if (count1>0){
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        LambdaQueryWrapper<Setmeal> qw2 = new LambdaQueryWrapper<>();
        qw2.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(qw2);
        //如果关联，抛出异常
        if (count2>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        //正常删除
        super.removeById(id);
    }
}
